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Development of ultrasonic time-of-flight computed tomography (TOF-CT) for inspection of concrete



Title: Development of ultrasonic time-of-flight computed tomography (TOF-CT) for inspection of concrete
Author(s): T. Nishiwaki, K. Adachi, H. Yanagida, Y. Tamura
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 309 - 317
Total Pages: 9
Nb references: 5
Language: English


Abstract: This study proposes ultrasonic time-of-flight computed tomography (TOF-CT) for the inspection of concrete structures. This technique can visualize the cross section of structural members of buildings in terms of the distribution of sound velocity obtained from the TOF measured for various propagation paths. The obtained image shows not only the presence of any anomaly but also the distribution of compressive strength or elastic modulus in the target section. When this technique is used for the inspection of an actual concrete column thoroughly covered with ceramic tiles, the cross section is easily visualized without causing any internal or external damage. A fundamental experiment is carried out to determine the influence of surface waves on the measured velocity of an ultrasonic wave. It is confirmed that ultrasound velocities measured in different paths for the same specimen are markedly different from each other.


Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00


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